([Equation   1] Pfl=[(x-(Tr/2)cos  θ+Lh·sin  θz+(Tr/2)sin  θ+Lh·cos  θ)](1)[Equation   2] Pfr=[(x+(Tr/2)cos  θ+Lh·sin  θz-(Tr/2)sin  θ+Lh·cos  θ)](2)[Equation   3] Prl=[(x-(Tr/2)cos  θz+(Tr/2)sin  θ)](3)[Equation   4] Prr=[(x+(Tr/2)cos  θz-(Tr/2)sin  θ)](4))